Explain the difference between a normal distribution and the standard normal distribution in the box below.

Three rooted teeth that are both present in dogs and cats are tooth numbers _________ .

Samples of rain taken on 12 days had an average pH of 6.10 with a standard deviation of 0.91.  Calculate a 90% confidence interval of the mean pH level of rain in this area.  Show your work in the file that you upload.  

When blood donors are randomly selected, 45% of them have blood type O.  In a group of 8 donors, find the probability that three of them are type O.  Put your work in the file that you upload.  Do not enter your results below.  

You’re trying to determine the percentage of airline flights that leave on time.  What sample size would be required to by 90% confident in your result with a margin of error of 2%?  Show your work and results in the file that you upload.  

The deciduous canine on the left mandible is tooth number:  

Chucky Finster is the dog pictured below with an elongated mandible.  This is called:

Provide an appropriate response.Use the spinner below to answer the question. Assume that it is equally probable that the pointer will land on any one of the five numbered spaces. If the pointer lands on a borderline, spin again. Find the probability that the arrow will land on 4 or 2.

Find the population mean or sample mean as indicated.Population: 6, 8, 2, 11, 13, 26

Provide an appropriate response. Express your answer as a simplified fraction unless otherwise noted.There are 30 chocolates in a box, all identically shaped. There 8 are filled with nuts, 9 with caramel, and 13 are solid chocolate. You randomly select one piece, eat it, and then select a second piece. Find the probability of selecting 2 nut candies.